CN109316774B - Low-temperature low-pressure steam regeneration recovery device and method - Google Patents
Low-temperature low-pressure steam regeneration recovery device and method Download PDFInfo
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- CN109316774B CN109316774B CN201811404660.0A CN201811404660A CN109316774B CN 109316774 B CN109316774 B CN 109316774B CN 201811404660 A CN201811404660 A CN 201811404660A CN 109316774 B CN109316774 B CN 109316774B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
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Abstract
The invention relates to a low-temperature low-pressure steam regeneration recovery device and a low-temperature low-pressure steam regeneration recovery method, which solve the technical problems that a large amount of cooling water is required to be consumed in the process of treating low-temperature low-pressure steam and latent heat in the steam is wasted in the prior art. The invention can be widely used for recycling low-temperature low-pressure steam.
Description
Technical Field
The invention relates to a steam regeneration recovery device and a method, in particular to a low-temperature low-pressure steam regeneration recovery device and a method.
Background
At present, a large amount of waste lye is discharged in the production process of the industrial fields of printing and dyeing, papermaking, food and the like, a multi-effect evaporation concentration technology is conventionally adopted for the treatment process of the waste lye, a large amount of low-temperature low-pressure secondary steam is generated in the process, cooling water is required to be used for condensing the secondary steam, a large amount of cooling water is consumed, and meanwhile, the latent heat in the secondary steam is wasted.
Disclosure of Invention
The invention provides a low-temperature low-pressure steam regeneration recovery device and a low-temperature low-pressure steam regeneration recovery method which are not applicable to cooling water and can recover and utilize latent heat in low-temperature low-pressure steam, and aims to solve the technical problems that a large amount of cooling water is required to be consumed and the latent heat in the steam is wasted in the low-temperature low-pressure steam treatment process in the prior art.
The low-temperature low-pressure steam regeneration recovery device is provided with a heat exchanger system, a jet flow mixer and a mixed humidifier, wherein the heat exchanger system is connected with a high-temperature high-pressure steam source through a high-temperature high-pressure steam inlet pipe, the heat exchanger system is connected with the low-temperature low-pressure steam source through a low-temperature low-pressure steam inlet pipe, a high-temperature high-pressure steam outlet pipe is arranged between the heat exchanger system and the mixed humidifier, a low-temperature low-pressure steam outlet pipe is arranged between the heat exchanger system and the jet flow mixer, a humidifying steam pipe is arranged between the mixed humidifier and the jet flow mixer, a steam condensing water source is arranged on the mixed humidifier, a high-temperature medium-pressure steam output pipe is arranged on the jet flow mixer, and the high-temperature medium-pressure steam output pipe is connected with a multi-effect flash steam main pipe.
Preferably, a temperature-increasing supercharger is arranged on the low-temperature low-pressure steam outlet pipe.
Preferably, the high temperature medium pressure steam outlet pipe is connected to a low temperature low pressure steam source.
Preferably, the low-temperature low-pressure steam source is connected with the high-temperature high-pressure steam source through a pipeline.
Preferably, a steam condensate pipe is arranged between the mixed humidifier and the steam condensate water source, and a pump is arranged on the steam condensate pipe.
Preferably, a low-temperature low-pressure steam delivery pipe is arranged between the low-temperature low-pressure steam source and the pump.
The invention also provides a method for applying the low-temperature low-pressure steam regeneration recovery device, which comprises the following specific steps:
(1) The low-temperature low-pressure steam enters the heat exchanger system through the low-temperature low-pressure steam air inlet pipe, the high-temperature high-pressure steam enters the heat exchanger system through the high-temperature high-pressure steam air inlet pipe, in the heat exchanger system, the two types of steam exchange heat, the high-temperature high-pressure steam subjected to heat exchange enters the mixed humidifier through the high-temperature high-pressure steam air outlet pipe, and the low-temperature low-pressure steam enters the jet mixer through the low-temperature low-pressure steam air outlet pipe;
(2) The steam condensate water and the high-temperature high-pressure steam subjected to heat exchange are mixed in a mixing humidifier, and then enter a jet mixer through a humidifying steam pipe;
(3) In the jet mixer, high-temperature high-pressure steam and low-temperature low-pressure steam are fully mixed and pressurized to form high-temperature medium-pressure steam, and the high-temperature medium-pressure steam is conveyed into a multi-effect flash steam main pipeline through a high-temperature medium-pressure steam output pipe to be used for a multi-effect flash evaporation system.
Preferably, the high temperature medium pressure steam may also be mixed with the low temperature low pressure steam source via the high temperature medium pressure steam outlet pipe.
Preferably, the high-temperature high-pressure steam source and the low-temperature low-pressure steam source are mixed and then enter the heat exchanger system through the low-temperature low-pressure steam inlet pipe.
The beneficial effects of the invention are as follows:
(1) Because the heat exchanger system is arranged, the high-temperature high-pressure steam and the low-temperature low-pressure steam exchange heat in the heat exchanger system, so that the low-temperature low-pressure steam can be heated once;
(2) Because the mixed humidifier is arranged, the steam condensate enters the mixed humidifier under the action of the pump, and the high-temperature high-pressure steam and the steam condensate subjected to primary heat exchange are mixed and humidified in the mixed humidifier, so that the moisture content in the high-temperature high-pressure steam is improved, and the heat exchange with the low-temperature low-pressure steam is facilitated;
(3) Because the jet mixer is arranged, the humidified high-temperature high-pressure steam and the humidified low-temperature low-pressure steam are mixed, and the pressure of the low-temperature low-pressure steam is further improved through the jet mixer;
(4) Because the temperature-increasing booster is arranged, the pressure and the temperature of the low-temperature low-pressure steam subjected to primary heat exchange in the temperature-increasing booster are increased to a certain extent, and a foundation is laid for mixing the low-temperature low-pressure steam with the high-temperature high-pressure steam in the jet mixer;
(5) By using the technology of the invention to recycle the low-temperature low-pressure steam, a large amount of cooling water can be saved, and the latent heat in the low-temperature low-pressure steam is fully absorbed and utilized, so that the use amount of the original steam is reduced, the energy is saved, and the resource waste is reduced.
Drawings
FIG. 1 is a schematic flow chart of embodiment 1 of the present invention;
FIG. 2 is a schematic flow chart of embodiment 2 of the present invention;
fig. 3 is a schematic flow chart of embodiment 3 of the present invention.
Description of the drawings:
1. a low temperature low pressure steam source; 2. a low-temperature low-pressure steam inlet pipe; 3. a heat exchanger system; 4. a high-temperature high-pressure steam inlet pipe; 5. a high temperature and high pressure steam source; 6. a multi-effect flash steam main pipe; 7. a high temperature medium pressure steam output pipe; 8. a low-temperature low-pressure steam outlet pipe; 9. a jet mixer; 10. a humidifying steam pipe; 11. a hybrid humidifier; 12. a steam condensate pipe; 13. a source of steam condensate; 14. a pump; 15. a low temperature low pressure steam delivery pipe; 16. a high-temperature high-pressure steam outlet pipe; 17. a temperature-increasing supercharger.
Detailed Description
The invention is further described below with reference to examples.
In embodiment 1 of the present invention shown in fig. 1, a low-temperature and low-pressure steam regeneration and recovery device is provided with a heat exchanger system 3, a jet mixer 9 and a mixed humidifier 11, wherein the heat exchanger system 3 is connected with a high-temperature and high-pressure steam source 5 through a high-temperature and high-pressure steam inlet pipe 4, the heat exchanger system 3 is connected with a low-temperature and low-pressure steam source 1 through a low-temperature and low-pressure steam inlet pipe 2, a high-temperature and high-pressure steam outlet pipe 16 is arranged between the heat exchanger system 3 and the mixed humidifier 11, a low-temperature and low-pressure steam outlet pipe 8 is arranged between the heat exchanger system 3 and the jet mixer 9, a humidifying steam pipe 10 is arranged between the mixed humidifier 11 and the jet mixer 9, a steam condensate water source 13 is arranged on the mixed humidifier 11, a steam condensate water pipe 12 is arranged between the mixed humidifier 11 and the steam condensate water source 13, a low-temperature and low-pressure steam conveying pipe 15 is arranged between the low-temperature and low-pressure steam source 1 and the pump 14, a high-temperature and medium-pressure steam outlet pipe 7 is arranged on the jet mixer 9, the high-temperature and medium-pressure steam outlet pipe 7 is connected with a multi-effect main pipe 6, and the high-temperature and medium-pressure steam outlet pipe 7 is connected with the low-temperature and low-pressure steam source 1.
The low-temperature low-pressure steam generated in the sea water desalination process and the high-temperature high-pressure steam provided by the boiler enter the heat exchanger system 3 to exchange heat between the high-temperature steam and the low-temperature steam, the high-temperature steam enters the mixed humidifier 11 after certain heat exchange, the steam condensate enters the mixed humidifier 11 under the action of the pump 14, the high-temperature steam and the steam condensate are mixed in the mixed humidifier 11, the moisture content in the high-temperature steam is improved, and more sufficient heat exchange can be realized.
The steam condensate source 13 may be provided from the outside or may be steam condensate from a low temperature low pressure steam drain.
The humidified high-temperature steam and low-temperature low-pressure steam are mixed and pressurized in the jet mixer 9, so that the temperature of the steam discharged from the jet mixer 9 is increased, the pressure is increased, the parameters required in the flash evaporation process are achieved, the humidified high-temperature steam and low-temperature low-pressure steam are conveyed into the multi-effect flash evaporation main steam pipe 7 through the high-temperature medium-pressure steam output pipe 7 to be subjected to flash evaporation, and under the condition of meeting the process requirements of a workshop, the redundant steam can be mixed with the low-temperature low-pressure steam discharged by the flash evaporation so as to improve the pressure and the temperature of the low-temperature low-pressure steam, and a foundation is laid for reuse.
In the embodiment 2 of the present invention shown in fig. 2, a temperature-increasing booster 17 is added on the basis of embodiment 1, the temperature-increasing booster 17 is arranged on a low-temperature low-pressure steam outlet pipe 8, low-temperature low-pressure steam after heat exchange enters the temperature-increasing booster 17 between a jet mixer 9 and a heat exchanger system 3, the pressure and the temperature of the steam are improved to a certain extent under the action of the temperature-increasing booster 17, and then enters the jet mixer 9 to be mixed with humidified high-temperature high-pressure steam, so that mixed steam with higher temperature and higher pressure can be obtained for a flash evaporation system under the condition that the input amount of the high-temperature high-pressure steam is unchanged, or the input amount of the high-temperature high-pressure steam can be reduced, the steam temperature and the pressure required by a flash evaporation process can be ensured, and energy sources are saved.
In embodiment 3 of the present invention shown in fig. 3, a low-temperature and low-pressure steam regeneration and recovery device is provided, which is provided with a heat exchanger system 3, a jet mixer 9 and a mixed humidifier 11, wherein the heat exchanger system 3 is connected with a high-temperature and high-pressure steam source 5 through a high-temperature and high-pressure steam inlet pipe 4, the heat exchanger system 3 is connected with a low-temperature and low-pressure steam source 1 through a low-temperature and low-pressure steam inlet pipe 2, a high-temperature and high-pressure steam outlet pipe 16 is arranged between the heat exchanger system 3 and the mixed humidifier 11, a low-temperature and low-pressure steam outlet pipe 8 is arranged between the heat exchanger system 3 and the jet mixer 9, a humidifying steam pipe 10 is arranged between the mixed humidifier 11 and the jet mixer 9, a steam condensing water source 13 is arranged on the mixed humidifier 11, a steam condensing water pipe 12 is arranged between the mixed humidifier 11 and the steam condensing water source 13, a low-temperature and low-pressure steam conveying pipe 15 is arranged between the low-temperature and low-pressure steam source 1 and the pump 14, a high-temperature and medium-pressure steam outlet pipe 7 is arranged on the jet mixer 9, the high-temperature and medium-pressure steam outlet pipe 7 is connected with a multi-effect main steam pipe 6, and the high-temperature and high-pressure steam source 1 is connected.
Under the condition that the low-temperature low-pressure steam is used for a flash evaporation system without balance after being treated, the high-temperature high-pressure steam provided by the boiler can be firstly mixed with the low-temperature low-pressure steam source 1 and then enters the heat exchanger system 3, so that the pressure and the temperature of the low-temperature low-pressure steam can be quickly and effectively improved, and the utilization rate of the low-temperature low-pressure steam is improved.
The invention also provides a method for using the low-temperature low-pressure steam regeneration recovery device of the embodiment 1, which comprises the following specific steps:
(1) The low-temperature low-pressure steam enters the heat exchanger system 3 through the low-temperature low-pressure steam inlet pipe 2, the high-temperature high-pressure steam enters the heat exchanger system 3 through the high-temperature high-pressure steam inlet pipe 4, the two types of steam exchange heat in the heat exchanger system 3, the high-temperature high-pressure steam subjected to heat exchange enters the mixed humidifier through the high-temperature high-pressure steam outlet pipe 16, and the low-temperature low-pressure steam enters the jet mixer 9 through the low-temperature low-pressure steam outlet pipe 8;
(2) The steam condensate water and the high-temperature high-pressure steam subjected to heat exchange are mixed in a mixing humidifier 11, and then enter a jet mixer 9 through a humidifying steam pipe 10;
(3) In the jet mixer 9, the high-temperature high-pressure steam and the low-temperature low-pressure steam are fully mixed and pressurized to form high-temperature medium-pressure steam, and the high-temperature medium-pressure steam is conveyed into the multi-effect flash steam main pipeline 6 through the high-temperature medium-pressure steam output pipe 7 for a multi-effect flash evaporation system.
Before entering the heat exchanger system 3, the low-temperature low-pressure steam source 1 can be mixed with high-temperature medium-pressure steam, and the balance heat source of the flash evaporation system is fully utilized to improve the pressure and temperature of the low-temperature low-pressure steam source 1, so that the energy is saved, and the heat exchange efficiency is improved.
The apparatus of embodiment 2 is also suitable for the above method, except that the low-temperature low-pressure steam heat-exchanged by the heat exchanger system 3 in step (1) is pressurized and heated by the temperature booster 17 before entering the jet mixer 9, so that the pressure and temperature of the mixed steam in the jet mixer 9 can be effectively increased.
The apparatus of embodiment 3 is also applicable to the above-described method, except that the low-temperature low-pressure steam source 1 is mixed with the high-temperature high-pressure steam source 5 provided by the boiler before entering the heat exchanger system 3, and the pressure and temperature of the low-temperature low-pressure steam source 1 are increased so as to increase the heat exchange efficiency.
By implementing the technology of the invention, the recycling of low-temperature low-pressure steam is realized, cooling water is not needed in the treatment process, a large amount of water resources are saved, the vaporization latent heat of the low-temperature low-pressure steam is fully utilized, the use of high-temperature high-pressure steam is reduced, the energy is saved, the cost is reduced, the alkalinity discharge of waste water of enterprises such as printing and dyeing, papermaking, food and the like can be greatly reduced, the treatment difficulty of the waste water is reduced, and finally the aims of clean production, development of circular economy, energy conservation and consumption reduction are achieved.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (9)
1. The low-temperature low-pressure steam regeneration recovery device is characterized by comprising a heat exchanger system, a jet flow mixer and a mixed humidifier, wherein the heat exchanger system is connected with a high-temperature high-pressure steam source through a high-temperature high-pressure steam inlet pipe, the heat exchanger system is connected with the low-temperature low-pressure steam source through a low-temperature low-pressure steam inlet pipe, a high-temperature high-pressure steam outlet pipe is arranged between the heat exchanger system and the mixed humidifier, a low-temperature low-pressure steam outlet pipe is arranged between the heat exchanger system and the jet flow mixer, a humidifying steam pipe is arranged between the mixed humidifier and the jet flow mixer, a steam condensation water source is arranged on the mixed humidifier, a high-temperature medium-pressure steam output pipe is arranged on the jet flow mixer, and the high-temperature medium-pressure steam output pipe is connected with a multi-effect flash evaporation system main steam pipe.
2. The low temperature and low pressure steam regeneration and recovery device according to claim 1, wherein the high temperature and medium pressure steam output pipe is connected with a low temperature and low pressure steam source.
3. The low temperature and low pressure steam regeneration and recovery device according to claim 1, wherein the low temperature and low pressure steam source is connected with the high temperature and high pressure steam source through a pipeline.
4. A low-temperature low-pressure steam regeneration and recovery device according to claim 2 or 3, wherein a temperature-increasing supercharger is arranged on the low-temperature low-pressure steam outlet pipe.
5. The low temperature and low pressure steam regeneration and recovery device according to claim 1, wherein a steam condensate pipe is arranged between the mixed humidifier and the steam condensate water source, and a pump is arranged on the steam condensate pipe.
6. The low temperature and low pressure steam regeneration and recovery device according to claim 5, wherein a low temperature and low pressure steam delivery pipe is arranged between the low temperature and low pressure steam source and the pump.
7. A method for using the low temperature and low pressure steam regeneration recovery device of claim 1, comprising the following specific steps:
(1) The low-temperature low-pressure steam enters the heat exchanger system through the low-temperature low-pressure steam air inlet pipe, the high-temperature high-pressure steam enters the heat exchanger system through the high-temperature high-pressure steam air inlet pipe, in the heat exchanger system, the two types of steam exchange heat, the high-temperature high-pressure steam subjected to heat exchange enters the mixed humidifier through the high-temperature high-pressure steam air outlet pipe, and the low-temperature low-pressure steam enters the jet mixer through the low-temperature low-pressure steam air outlet pipe;
(2) The steam condensate water and the high-temperature high-pressure steam subjected to heat exchange are mixed in a mixing humidifier, and then enter a jet mixer through a humidifying steam pipe;
(3) In the jet mixer, high-temperature high-pressure steam and low-temperature low-pressure steam are fully mixed and pressurized to form high-temperature medium-pressure steam, and the high-temperature medium-pressure steam is conveyed into a multi-effect flash steam main pipeline through a high-temperature medium-pressure steam output pipe to be used for a multi-effect flash evaporation system.
8. The method of a low temperature, low pressure steam regeneration recovery unit of claim 7, wherein the high temperature, medium pressure steam is also mixed with the low temperature, low pressure steam source through the high temperature, medium pressure steam outlet pipe.
9. The method of claim 7, wherein the high temperature and high pressure steam source and the low temperature and low pressure steam source are mixed and then enter the heat exchanger system through the low temperature and low pressure steam inlet pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811404660.0A CN109316774B (en) | 2018-11-23 | 2018-11-23 | Low-temperature low-pressure steam regeneration recovery device and method |
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| CN201811404660.0A CN109316774B (en) | 2018-11-23 | 2018-11-23 | Low-temperature low-pressure steam regeneration recovery device and method |
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| CN109316774A CN109316774A (en) | 2019-02-12 |
| CN109316774B true CN109316774B (en) | 2023-09-26 |
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| CN112963823B (en) * | 2021-03-31 | 2022-08-19 | 成都三山粮油有限公司 | Steam heat energy recovery system |
| CN114917606A (en) * | 2022-05-30 | 2022-08-19 | 聊城鲁西甲酸化工有限公司 | Energy coupling system and method for formic acid rectifying tower and hydrolysis reactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2643252Y (en) * | 2003-06-18 | 2004-09-22 | 北京清源世纪科技有限公司 | Middle and high temperature powerdriven compressive heat pump equipment |
| CN105423266A (en) * | 2015-12-25 | 2016-03-23 | 中石化节能环保工程科技有限公司 | High and low-temperature sewage waste heat cascade utilization and resource recycling system and method thereof |
| CN205782821U (en) * | 2016-06-23 | 2016-12-07 | 华峰集团有限公司 | High steam recovery system |
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- 2018-11-23 CN CN201811404660.0A patent/CN109316774B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2643252Y (en) * | 2003-06-18 | 2004-09-22 | 北京清源世纪科技有限公司 | Middle and high temperature powerdriven compressive heat pump equipment |
| CN105423266A (en) * | 2015-12-25 | 2016-03-23 | 中石化节能环保工程科技有限公司 | High and low-temperature sewage waste heat cascade utilization and resource recycling system and method thereof |
| CN205782821U (en) * | 2016-06-23 | 2016-12-07 | 华峰集团有限公司 | High steam recovery system |
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